18.3 Viral Diseases KEY CONCEPT Some viral diseases can be prevented with vaccines.

18.3 Viral Diseases

KEY CONCEPT Some viral diseases can be prevented with vaccines.

18.3 Viral Diseases

Viruses cause many infectious diseases

• There are many examples of viral infections.– common cold

Rhinovirus over 100 different types

18.3 Viral Diseases

– influenza

Viruses cause many infectious diseases

• There are many examples of viral infections.– common cold

18.3 Viral Diseases

– influenza

Viruses cause many infectious diseases

• There are many examples of viral infections.– common cold

– SARS

18.3 Viral Diseases

– HIV

HIV-infected whiteblood cell

Viruses cause many infectious diseases

• There are many examples of viral infections.

• The body has natural defenses against viruses.

18.3 Viral Diseases

A substance that stimulates the body’s own immune response against invasion by microbes.

• Made from a weakened form of the virus itself.

• Triggers the body’s immune system to produce antibodies

• Memory cells “remember” the virus so future attacks can be prevented.

• Measles • Mumps• Rubella• Influenza• Chicken Pox• Hepatitis• Meningitis• Polio• Small Pox (not used anymore)

• HIV (Aids)• Common cold• West Nile Virus